163806943 has 4 divisors (see below), whose sum is σ = 170929008. Its totient is φ = 156684880.

The previous prime is 163806919. The next prime is 163806949. The reversal of 163806943 is 349608361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 349608361 = 43 ⋅8130427.

It is a cyclic number.

It is not a de Polignac number, because 163806943 - 2⁹ = 163806431 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 163806896 and 163806905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163806949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3560998 + ... + 3561043.

It is an arithmetic number, because the mean of its divisors is an integer number (42732252).

Almost surely, 2^163806943 is an apocalyptic number.

163806943 is a deficient number, since it is larger than the sum of its proper divisors (7122065).

163806943 is an equidigital number, since it uses as much as digits as its factorization.

163806943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7122064.

The product of its (nonzero) digits is 93312, while the sum is 40.

The square root of 163806943 is about 12798.7086457970. The cubic root of 163806943 is about 547.1554992406.

The spelling of 163806943 in words is "one hundred sixty-three million, eight hundred six thousand, nine hundred forty-three".